Starting device for internal-combustion engines



Oct. 13, 925.

F. MULLER STARTING DEVICE FOR INTERNAL COMBUSTION ENGINES Filed Aug. 9,

Il 'III 1921 2 Sheets-Sheet 1 lllllll llllll I-nvanlon Frieivic 'h Mb'llar" 1,557,184 F. MULLER Oct. 13, 1925- STARTING DEVICE FDR INTERNAL COMBUSTION ENGINES Filed Aug. 9, 1921 ZSheets-Sheet 2 1916,, and patent To all 'wlwrnit may concern:

Patented on. '13, 1925'.

UNITED STATES 1,551,184 PATENT oFF cE.

I FRIEDRICH rrunnnn, or VIENNA, susrnm.

STARTING- DEVICE F OR INTERNAL-GOMBUSTION ENGINE.

Application filed August 9, 1921. Serial No. 491,005. M

Be it known that I, FRIEDRICH Mii LER, a citizen of the Republic'of Switzerland, residing at TV Prinz Eugenstrasse 80, Vienna,

Austria, have invented a Starting Device for] 1921; Switzerland, March 24, 1921; Italy,- March 29, 1921), of which the following is a specification.

The invention relates to spring starters of" a known type for internal combustion engines or the like, in which the starting is effected by the unstressing of a spring that. is adapted to be stressed preferably by hand. The arrangement, according to the invention differs from the well-known spring starters b the winding up of the springs, one or a plurality of which are provided, being effected by means of a self-locking worm gear, the parts of which are adapted to be disengaged from one another or to be disengaged as a whole from the part to be operated. By emplo ing a self-locking worm gear, the parts 0 which are adapted to be disengaged from one another or to be disengaged asfa whole,owing to the large gearing ratio which can easily be adopted, the operation of the arrangement is made easier and it becomes possible considerably to simplify the arrangement and manipulation,

. while the action istvery certain.

The accompanying drawing illustrates-the .invention by two constructional forms.

In Figure 1, 1 is the engine, 2 the foundation or fixing frame of the engine and 3 a starting spring, which acts axially. The stressing of this spring is efi'ected by means of a free-wheel arrangement 4, which is adapted to be coupled to the engine shaft and can be turned with a crank 5' by-a self-locking worm. gear, the gearing ratio of the worm gear being so chosen, that only a small expenditure of power is required to operate it with the crank. In the constructional example shown in the drawing the free-wheel arrangement takes the form of a rope drum, which. is mounted on the engine shaft, is operatively connected therewith by a oneto rotate and to start the machine,

way clutch and is adapted tobe turned with the crank 5 through a self-locking worm gear wheel 6. The spring is in operative connection with the drum by means of a. rope 8, which passes over the guide pulley 7, and is stressed by the rope in the axial direction. When starting, .the rope drum must first be axially displaced and coupled by the clutch 9 and the pin 10 with the engine shaft. The worm gear is then released by removing the worm from the worm' wheel, the spring 3 unwinding, whereby the engine is put in operation by the force of the said spring.

. In the arrangement according to Fig. 2 a battery of four starting springs 3, 3, 3"

and 3 is provided, which have to store the .energy required for starting and are preferably mounted on the longitudinal side of the engine, which is opposite the control platform. These springs are made in the form of buffer springs. The transmission of the springenergy on winding up and on starting is .in this case efi'etced through i toothed wheels 11 and 12 and a threaded spindle 13. The toothed wheel 11 can .be turned by the crank 5 through a worm gear ing 6. When the toothed wheel 12 is operated by the toothed wheel 11, the spindle 13 is axially displaced, while 1t isprevented from rotating by keys 14 and 15, and stresses the battery of springs. On starting, a clutch 9 is brought into operative connection with the engine shaft by a pin 10, b the toothed wheel 11 beingdisplaced axia ly by disengaging means 16. The battery of springs acts throu h the threaded spindle 13 on the toothed w eels 12 andll, which, on the worm gearing being disengaged, are caused The spindle 13 is prevented from rotating by the keys 14 and 15 that are located partly in a groove in the spindle, and partly in grooves in the bearings in frame 2. The

threads of the spindle are square as shown and slide fully in said bearin which are smoothed internally andwit out interior threads. The hub of the wheel 12 is threaded and is held against-longitudinal ,movement by the bearings for the screw, and as the wheel is rotated the spindle is shifted longitudinally. The remaining which the locking of the worm gearing is released on starting.

figures show the manner in I In Figure 3 the worm 6, along with the worm shaft 6" is moved downwards and thespindle 17 and the crank 5, drops, at the same time turning aboutthe point 18. The worm wheel 6' is then caused to turn through the action of the starting springs.

Figure 4 shows how the worm 6 may be displaced by the eccentrics 19. The eccentrics are connected together by an arm 20 and are displaced b a hand-operated lever 21. On this lever ingthrown over, the

worm wheel 6' is caused to disengage from the worm 6.

Figure 5' shows an arrangement, in which the worm can be dis laced axially. The worm 6 is slid away om the teeth of the worm wheel 6'. When the worm is out of engagement, the starting spring is released and starts the engine. In the arrangement shown in Fig. 6 the worm 6 remains permanently in mesh with the worm wheel 6, The worm wheel is in operative connection with the rope drum 4 through the shaft 22. The rope drum is keyed on this shaft, while the worm wheel is loosely mounted on it. For stressing the springs by means of the clutch coupling 23,

the worm wheel is 'coupled with theshaftr The coupling is thrown in by means of the hand lever 25. thrown out, on the engine being started, the worm gearing is disengaged from the rope drum and the shaft 22 runs loosely in the bore of the worm .wheel, on the starting springs coming into action.

The disengaging, on starting up, is referably worked from the control plat orm, in the case of vehicles from the drivers seat.-

Patent claims 1; The combination with an internalcombustion engine, of a starting device 1 therefor, comprising resilient means opera- 'ble, when stressed, to rotate the engine- .shaft,a self-locking worm-gearing comprising a worm" and a worm-wheel adapted to be engaged with and disengaged from each other, means for disengaging said gearing from the resilient means and operative connections between said worm-gearing and said resilient means.

2. The combination with an internal-com- "bustion engine, of a starting device there- 'for, comprising resilient -means operable, when stressed, to rotate the engine-shaft, a worm-gearing comprising a worm and a worm-wheel, means for disengaging said ring from the resilient means, a shaft gea rotatable with and carrying said wormwheel, a drum carried by and rotatable with said shaft, and a flexible connection between said drum and said'resilient means for stressing the latter when said drum is rotated in one direction.

3. In starting devices for engines,' the When this coupling is combination of a spring, a longitudinally moving member adapted to put the spring under compressioma crank arm having 1n-.

termediate gearing to actuate the longitudia drum on the shaft, a cord on the drum and devices for engines, the

connected with the plunger, a worm gear 7 wheel on the shaft, aworm on the crank arm shaft, and a clutch adapted to connect the drum with the power shaft of the (m- 5. The combination wlth an1nternal-com bustion engine, of a starting device therefor, comprising resilient means operable,

when stressed, to rotate the engine-shaft, a-

worm-gearing comprising a worm and a.

worm-wheel, means for rendering the wormtween said drum and said resilient means for stressing the latter when said drum is rotated in one direction.

gearing inoperative to hold the, resilient 6. The combination with an internal-combustion engine, of a starting device therefor, comprising resilient means operable, when stressed,to rotate the engine-shaft, a worm-gearing comprising aworm and a worm-,wheel adapted to be engaged with and disengaged from each other, a shaft rotatable with and carrying said wormwheel, a drum carried by and rotatable'with said shaft and shiftable into and out of clutching engagement with the engine-shaft,- and-a flexible connection between said drum and said resilient means for stressing .the latter when. said drum is rotated in one direction. 7 V

7 The combinationwith an internal combustion engine of a starting device therefor comprising a spring device operable, when stressed, to rotate the engine shaft, a self-. locking worm-gearing; a free wheel arrangement on the starting shaft for stress' the spring device by means of the self-locking worm-gearing, a clutch between the free wheel arrangement and the engine shaft, and means for throwing in the clutch and for releasing the locking of the worm gear-.

worm'gearing comprising a worm and worm wheelfor stressing said spring device and hold the spring in tension, and means for X releasing the spring device by disconnecting said worm gearing comprising a worm and two of these parts. v worm wheel which are adapted to be disen- 9. The combination with an internal comgaged from each other for releasing the 10 bustion engine of a starting device therefor spring device. 5 comprising a spring'device, a self-locking V1B1ma,Al1StI'1a, ly 1921.

worm gearing for stressing said spring de-' vice and maintaining the spring in tension, v FRIEDRICH MULLER. 

